BTRFS-SELECT-SUPER - reference manual online

Overwrite superblock with a backup.

Chapter

06/15/2017

BTRFS-SELECT-SUPER(8) Btrfs Manual BTRFS-SELECT-SUPER(8)NAME
btrfs-select-super - overwrite superblock with a backup
SYNOPSIS
btrfs-select-super -s number dev
DESCRIPTION
btrfs-select-super destructively overwrites all copies of the superblock with a specified
copy. This helps with certain cases of damage, especially when barriers were disabled
during a power failure. You can find a valid copy of the superblock with btrfs check -s.
The filesystem specified by dev must not be mounted.
OPTIONS
-s|--super <superblock>
use <superblock>th superblock copy, valid values are 0 up to 2 if the respective
superblock offset is within the filesystem
SEE ALSO
btrfsck check(8)Btrfs v4.4 06/15/2017 BTRFS-SELECT-SUPER(8)